package com.webyweather.android;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ScrollView;

/**
 * Created by tair_mustafaiev on 7/17/13.
 * <p/>
 * Copyright 2012 Roman Nurik + Nick Butcher
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
public class ObservableScrollView extends ScrollView {

    private Callbacks mCallbacks;

    public ObservableScrollView (Context context) {
        super(context);
    }

    public ObservableScrollView (Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ObservableScrollView (Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onScrollChanged (int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (mCallbacks != null) {
            mCallbacks.onScrollChanged();
        }
    }

    @Override
    public int computeVerticalScrollRange () {
        return super.computeVerticalScrollRange();
    }

    public void setCallbacks (Callbacks listener) {
        mCallbacks = listener;
    }

    public static interface Callbacks {

        public void onScrollChanged ();
    }
}
